транслитерировать символы верхнего регистра в нижний регистр (transliterate uppercase characters to lowercase)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
_tolower — transliterate uppercase characters to lowercase
Синопсис (Synopsis)
#include <ctype.h>
int _tolower(int c);
Описание (Description)
The _tolower() macro shall be equivalent to tolower(c) except
that the application shall ensure that the argument c is an
uppercase letter.
Возвращаемое значение (Return value)
Upon successful completion, _tolower() shall return the lowercase
letter corresponding to the argument passed.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
Applications should use the tolower() function instead of the
obsolescent _tolower() function.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
The _tolower() function may be removed in a future version.
Смотри также (See also)
tolower(3p), isupper(3p)
The Base Definitions volume of POSIX.1‐2017, Chapter 7, Locale,
ctype.h(0p)
